Only down side to that, the genie and clients are swm only, so then after you dig 4 lines from the kaku lnb, you would have to put in a swm switch to convert it to swm, which would not cheap, just running 3 more lines 300 feet, is a box of cable, that itself is about $60+. Swm switch is pretty pricey also...
I have seen clients work 300 feet from the power inserter, I've done it several times at the lakes, dish is at the house, 3 receivers in the house, 1 receiver at the boat house 300+ feet away, usually as long as the power inserter is close enough to the dish, the runs to the clients can be pretty long, since all they are doing is sending channels down stream, it has worked so far.